Bolt anchorage with loosening preventing means



Aug. 24, 1965 J. .1. KORENQHAN 3,02034 BOLT ANCHORAGE WITH LOOSENING PREVENTING MEANS Filed Jan. 18, 1965 3 Sheets-Sheet l jb" 265 Zi' INVENTOR.

Aug. 24, 1965 J. J. KORENCHAN BOLT ANCHORAGE WITH LOOSENING PREVENTING MEANS Filed Jan. 18, 1963 5 Sheets-Sheet 2 Aug. 24, 1965 J. J. KORENCHAN BOLT ANCHORAGE WITH LOOSENING PREVENTING MEANS Filed Jan. 18, 1963 5 Sheets-Sheet 5 INVENTOR.

VQ/ZP/wLc/WQ United States Patent O 3,202,034 BOLT ANCHORAGE WITH LOSENING PREVENTING MEANS John I. Korenehan, Chicago, Ill., assigner to .lohn J. Korenchan, trustee Filed Jan. 18, 1963, Ser. No. 252,490 4- Claims. (Cl. 85-67) This application is a continuation-in-part of my prior application Serial No. 192,795, tiled May 7, 1962, and now abandoned.

This invention releases to a bolt anchorage and is particularly useful where usable threads are not available. The invention is useful in connection with such bodies as bricks, concrete walls, and even steel, where a recess is to have an anchorage Without cutting threads therein for use with a bolt for bolting some particular object in position.

In all such threadless anchorages referred to above, friction has been relied upon to create a wedging action of Ia mass of metal Within -a recess having more or less smooth walls constituting the setting. This mass of metal itself as an anchorage is provided with internal threads for cooperation with a bolt so that conventional bolt action may then be obtained. In all anchorages known, a serious diiculty in connection with such anchorages has been that the tighter the bolt was turned in the anchorage, the more likely the entire anchorage means itself would be turned with the bolt and the more likely the mass of metal comprising the anchorage would be pulled out of its setting. The present invention has as its fundamental functional objective, an anchorage wherein the tighter a bolt is turned or the tighter the bolting action is, the greater is the locking action of the mass of metal constituting the anchorage within the setf ting and the greater is the holding force. The invention also provides means whereby the anchorage itself is prevented from turning Within its setting even though large turning forces are applied in connection with tightening the bolt of the anchorage. The invention can be embodied in various modiiications, .all of which have the same basic underlying concept.

In general, the invention provides a metallic construction wherein an enlongated inner sleeve is part of the anchorage means within the anchorage setting. This sleeve is disposed so that the axis of the sleeve is generally parallel to the axis of the recess Within the setting and the sleeve has one (rear) end deep within the body of the setting and has its other (front) end nearer the open end of the recess. The inner sleeve has its outer surface adjacent the rear end shaped to provide an outwardly flaring body portion in the general shape of the frustum of a cone, with the cone taper being such that the maximum diameter is at the rear end of said sleeve. The small end of the frusto-conical portion is at an intermediate part of said sleeve. The remainder of said inner sleeve to the front end has a generally uniform outside diameter and at least part of this outer surface beginning with the front end of the .sleeve and extending at least part way toward the smaller cone end is provided with a screw thread. An outer sleeve portion is provided for the uniform part of the inner sleeve portion. The end part of the outer sleeve portion adjacent the frusto-conical part of the inner sleeve portion is slit to permit the slotted end of the outer sleeve to expand when forced to move over the frusto-conical part. The outer sleeve is small enough so that the conical tapered portion of the inner sleeve can not enter the adjacent inner slotted end of the outer sleeve without expanding the end of said outer sleeve. The outer sleeve has its outer end nearer the open end of the recess but is adapted to be well Within the recess. Means are provided for forcibly moving the outer sleeve longitudinally of the inner sleeve to produce the aforementioned expansion action of said outer sleeve. This means for producing this expansion action includes an internally threaded member which cooperates with the external threading on the inner sleeve so that upon relative rotation between said internally threaded member and the inner sleeve, the expansion movement between said conical part and the slotted outer sleeve can take place.

The inner sleeve has one part of a bolt means disposed within the bore thereof when the anchor means is installed and this same bolt means has another part thereof extending beyond what might be termed the front end of the inner :sleeve and body recess so as to be available for bolting a desired object to said recessed body. The bolt means includes still another part which is larger than the bolt part within the inner sleeve and this still other part must be turned for tightening or bolting down the desired object against the recessed body. This bolt means cooperates with the inner sleeve in a manner to be rotatably locked at least in one condition of the entire anchorage means. The hand ofthreads, such as left-hand or `right-hand threads, are so selected that considered from the open end of the recess when the anchorage is in-` stalled, the direction of rotation of the part which is necessary to turn for tightening the object to be bolted will be the same direction as is necessary to tighten the conical part of theinner sleeve against the slotted part portion of the outer sleeve. As the result, the harder the bolt means are drawn up in connection with the nal use of the anchorage in bolting an object in position, the greater will be the force tending to wedge said anchorage means in said recess and also the greater the force tending to lock the anchorage means generally from turning with respect to the wall of said recess. The thread used on the bolt will be of opposite hand to the thread on the outside of the inner sleeve.

The various embodiments of the invention differ among each other by the fact that some of these portions or parts have been combined into one physical structure, while other portions have been separated to perform the desired functions. In one form of the invention, the inner sleeve is provided with a thread cooperating with the bolt for anchoring the object and in such case, and for convenience, these two cooperating threads will be righthand standard threads. In this particular modification, the nature of the thread for the outside of the inner sleeve will be left-hand so that the various threaded parts work against each other to effect an overall tightening action. In a modied form of this device, the outer sleeve and internally threaded member may be combined into one unitary structure. In still a different form of device, a pair of conical members 'are provided, one forming part of the inner sleeve as previously mentioned. In a further modified form of the invention, the inner sleeve may be smooth on the interior and the bolt used may be rotatively locked to said inner sleeve at least for one direction of rotation so that the combined tightening action will result. In this last named modification, this being useful in anchorages in floors where a bolt is telescoped from a well up into position, it is desirable to have the head of the bolt below, with the threaded end of the bolt available for passing through a part of an object to be bolted and a clamp nut cooperating with said bolt for completing the bolting action. p

The various forms embodying the present invention are advantageous in that they are mechanically simple and are susceptible to automatic production. The various embodiments of the invention are provided with renements permitting relative rotation between certain parts of the anchorage in the direction of tightening without Patented Aug. 24, 1965 permitting such parts to be loosened up in the reverse direction. The tightening referred to 'above is in connection with tightening of the anchorage means in the recess. Actually, the one-way action referred to above is so directed that when a bolt means is tightened into final position, the entire anchorage means locks and wedges in more tightly than ever.

In order to disclose the invention, reference will now be made to the drawings wherein:

FIGURE l is an elevation partly in section showing one form of anchorage embodying the present invention, ready to be installed in a recess within a body, this view also showing the means that may be used for tightening the anchorage.

FIGURE 2 is an exploded perspective view of the parts of the anchorage of FIGURE l.

FIGURE 3 is an elevation partly in section of a modified form of anchorage wherein the tightening nut and rotatable cone are in one piece.

FIGURES 3A and 3B are details illustrating the ratchet arrangement.

FIGURE 4 is an elevation partly in section showing a still further modified form of the invention, this view showing the means for tightening the anchorage in position.

FIGURE 5 is an exploded view of the parts making up the anchorage illustrated in FIGURE 4.

FIGURE 6 is a section upon line 6-6 of FIGURE 4, this section showing a bolt threaded into the anchorage sleeve.

FIGURES 7 and 8 are modifications respectively of the forms illustrated in FIGURES 3 and 4 applied to a disappearing bolt-type of anchorage.

FIGURE 9 shows the spanner wrench and blind nut for use in connection with the disappearing bolt-type of anchorage.

Referring first to FIGURE l, the yanchorage illustrated here comprises inner sleeve 10 having internal thread 1I. extending for the full length of the sleeve. Thread 11 is most conveniently of the right-hand type for cooperation with the bolt to be used in connection with the nal installation of an object to be bolted. Inner sleeve 1S) has its rear end provided with tapered portion 16, this tapered portion being conveniently in the shape of a frustum of a cone with the large end of the frusto-conical portion being yat the very end of said inner sleeve. The bore diameter of inner sleeve 16' is generally uniform throughout the length of the sleeve. Frusto-conical end 16 of the sleeve is adapted to be in the deepest part of the recess in the anchorage setting, with the front end of the inner sleeve being nearer the open end of the recess.

Frusto-conical part 16 is provided with flutes or knurls on the surface to produce teeth which are straight along the axis of the sleeve. It is understood that all of the parts of the anchorage, except as stated otherwise, will be of metal such as steel or other suitable material.

The outer cylindrical surface of inner sleeve Itl has external threading I2 beginning from the front end of the sleeve, that is, the end remote from frusto-conical portion 16. This externally threaded portion extends for a substantialdistance along the external surface of the inner sleeve and, in this instance, stops short of the small end of frusto-conical portion 16.

Internal threading 11 of inner sleeve 10, as has been previously indicated, is conveniently rightahand. In that case, the threading on the outer surface of inner sleeve 16 will be of opposite hand and in this particular instance, will be left-hand.

Cooperating with frusto-conical portion lo is outer sleeve member, generally indicated by 2l, which in this particular instance is slotted to provide three separate pieces 22, 23 and 24. The slots extend longitudinally of the outer sleeve and the purpose of the slots is to permit this outer sleeve assembly to be expanded. If

outer sleeve 2l is long enough, the slots need extend from each sleeve end for a distance and not the entire length of sleeve 2l. The outer surface of outer sleeve ZI is knurled to provide a rough nish. Outer sleeve 2l is dimensioned so that it will slide smoothly over inner sleeve l0 and the slots permitting the sleeve end to telescope truste-conical portion I6.

Frusto-conical portion I6 is large enough so that only the small end thereof can tit into the corresponding end of slotted sleeve 2l in the normal position of the outer `sleeve parts so that any telescoping movement between the sleeves to force frusto-conical portion I6 into outer sleeve 21 will result in expanding this outer sleeve or the end portion thereof at least.

As a convenience, strip 2:8 of soft metal such as lead can be provided, this being slit at 29. This additional outer sleeve will be disposed around the outside of the first named outer sleeve 2l and when outer sleeve 2l is expanded, it will expand lead sleeve 2S so that the lead sleeve will be pressed tightly against the opposite wall of the recess. This lead sleeve may be omitted if desired or, in this particular form of the invention, the lead sleeve may be used instead of three-piece sleeve ZI. At any rate, the unitary lead sleeve is convenient for holding the three pieces of outer sleeve 2l together against loss prior to installation of the entire anchorage means.

Means are provided for telescoping outer sleeve 2l over frusto-conical portion 16. In the form of the invention illustrated here, this means takes the form of outer or forward frusto-conical sleeve IS and threaded nut member IS, which in this particular instance would have a left-hand thread for cooperation With outer left-hand thread I2 of inner sleeve It. In this form of the invention, frusto-conical member I8 has the inside surface thereof smooth and the outer surface knurled with a straight knurl similar to frusto-conical portion I6 of the inner sleeve.

Threaded nut member I5 hass lots 30 and 31 at its end face for engagement by a Spanner Wrench having teeth so that nut 15 can be turned. If nut l5 is turned anticlockwise as viewed from the front or open end of the recess with the assumed threads, forward frusto-conical member 1S will be forced into the interior of outer sleeve 21 and in turn, this outer sleeve will be forced over frustoconical portion 16 of the inner sleeve. The edge portions at the inside of outer sleeve 21 are bevelled and provided with knurling so that the teeth on the outside of the two cones will tend to lock with the outer sleeve and only permit outer sleeve 2l to move longitudinally of the inner sleeve and prevent any relative rotation between the two sleeves. In connection with tightening the entire anchorage, the assembly is first installed as illustrated in FIGURE l. Thereafter, pilot stud 33 having a short length of bolt 34 is threaded into inner threaded portion Ill of the inner sleeve. en the pilot stud is tight, nut I5 can be turned by Spanner wrench 33a while pilot stud 33 is prevented from turning. The spanner wrench is positioned over the reduced part of stud 33 and can be turned independently of stud 33. This can be accomplished by holding the handle part of the pilot stud to prevent inner sleeve lil from turning while nut IS is turned tightly into position. Pilot stud 33 can then be turned to loosen it and withdraw it, after which a bolt with a longer threaded portion can be threaded into portion Ill and used to bolt anything in position.

Referring now to FIGURE 3, conical member I8 and nut I5 of the first form of the invention described have been combined into one unitary structure. Thus in this modication, l5 is provided with, in this particular instance, a left-hand thread on the inside and is provided with frusto-conical outer surface I8. However, outer surface I8 of conical member l5 is knurled to provide ratchet teeth to permit nut l5 to be turned anticlockwise (with this particular thread, this will tighten the nut), these ratchet teeth cooperating with correspondingly shaped ratchet knurled teeth 26 within the outer end of front sleeve 21. In this modification, outer sleeve 21 only has one slot longitudinally thereof so that this sleeve does not have separate pieces to be maintained together. However, additional longitudinal cuts in sleeve 21 may be provided so that weakened regions will permit sleeve 21 to break into pieces similar to sleeve 21 in FIGURE 2. Outer sleeve 21 may have its rear end provided with straight knurling to match the straight knurling of frustoconical portion 16 of the inner sleeve. The outside of outer sleeve 21 may be covered with an additional outer sleeve 2S of lead as before.

p In this modication, both cones and the cooperating outer sleeve parts can have ratchet knurling. The ratchets on the cones and two sleeve ends are all the same. When the two cones are facing each other with the small ends nearest each other, the direction of slip for both ends of the sl-eeve will be opposite as seen from one end. Hence the anchor will function effectively and can he made easily because of similarity of ratchet teeth for both ends.

The modification just described can be installed and tightened by means of Spanner' wrench 33a having jaws for engaging slots 3d and 31 of the nut. The inner sleeve can be held against turning by pilot stud 33 having small threaded portion 3d for engaging the inside thread 11 of the inner sleeve. The procedure generally, is the same as in the form Iirst described. Insofar as tightening is concerned, it will be clear that the ratchet teeth will slip in a direction to permit the two cones to approach each other, while these same ratchet teeth will lock in the reverse direction.

Referring now to FIGURES 4 to 6 inclusive, a further modification is shown wherein the outer sleeve and nut member for forcing the slotted outer sleeve up the slope of the conical portion are combined into one. In this further modiiication inner sleeve 11@ differs from the Vinner sleeve of the previous forms by having external threads 112 extend much deeper from the front end of the sleeve and, in fact, up to the small end of frustoconical portion 116. The two frusto-conical portions and sleeves all have ratchet teeth of the same kind as explained above in connection with FIGURE 3.

Outer sleeve member 121 in this further modication includes outer sleeve portion 121a and threaded portion 121b as one integral structure. Slotted portion 121:1 can have as many slots as necessary to permit portion 121a to expand outwardly. The outer surface of slotted portion 121er is cross knurled as with sleeves 21 and 21'. The inside surface of slotted portion 121e, however, is provided with matching ratchet teeth 121C which cooperate with ratchet teeth upon truste-conical portion 116 of inner sleeve 110. In this particular modification, as in the preceding forms, inside thread 111 of the inner sleeve is a right-hand thread, thus requiring outer thread 112 to be left-hand. Since in the assumed example nut portion 1211) must turn relative to sleeve 111) anti-clockwise to advance toward conical portion 116 of inner sleeve 110, it is necessary that the ratchet teeth of conical portion 116 and outer sleeve portion 121 be so directed as t0 slip past each other when slotted portion 121e turns anticlockwise as seen from the small end of the inner sleeve. Thus slotted portion 121e can climb up conical portion 116 with the ratchet teeth slipping. As explained before, the ratchet teeth turn out to be in the same direction when viewed from each end.

In this particular form of the invention, combined outer sleeve and nut portion 121 can be provided with an additional lead sleeve if desired. This form of the invention requires the anchor means to be installed in a recess in a somewhat diderent fashion than the forms previously described. Here it is necessary to turn inner sleeve 1111 and keep outer sleeve 121 and its threaded 6 portion 121b from turning. This is accomplished in a simple manner by using stud 133 having threaded end portion 134. Pilot holding collar 137 having a smooth inside surface 138 is disposed over smooth part 133 of the pilot stud. Pilot holding collar 137 has threaded stub 138 to match inner threaded part 12 of sleeve 121. In the example assumed, this outer thread for pilot holding` collar 137 is left-hand and will be screwed in for a number of turns into the open end of threaded portion 112 of outer sleeve member 121 until the pilot holding collar is snug against the end of the anchorage means or the` end wall surrounding the recess. Preferably, the outside` surface of pilot holding collar 137 is knurled so that it may be held by hand or a wrench to prevent turning. Pilot stud 133 is now inserted and part 134 threaded into threaded portion 111 of inner sleeve 110 until tight.

The pilot stud has only a small amount of thread thereon, so that this stud can quickly be turned to lock in the inside of inner sleeve 110. The entire anchorage is now tightened by preventing collar 137 from turning and turning pilot stud 133 in a clockwise direction as seen from the front. In this direction, the ratchet knurling or teeth of conical portion 116 of inner sleeve 111) land of 121C of outer sleeve 121 will slip and permit the anchorage to be tightened into position. When everything is tight, pilot stud 133 can be reversed and removed and pilot holding collar 137 can be removed and the anchorage is installed ready for use. A bolt having conventional threading as long as desired can now be used for anchoring any object in position. This bolt will screw into inner thread 111 of the inner sleeve and when tightened will also tighten the anchorage in the recess.

In the anchorage means so far described, the anchor bolt to be finally used is put infrom the front and the bolt itself is turned into the threaded portion in the interior of the inner sleeve. However, there are certain instances, particularly where floor anchorages are desired, in which means are provided for bolts to drop below the level of the floor. Such bolt would not be tightened but would have a nut threaded on there, the two constituting a bolt means for locking an object such as a machine to a door. The anchorage means embodying the present invention can be modified to accommodate such a structure. Referring now to FIGURE 7, a modification of the form illustrated in FIGURE 3 is shown for the disappearing bolt type of anchorage. In all the disappearing bolt type anchorage means, the inside surface of the inner sleeve need not be threaded, since the disappearing bolt thread does not cooperate with the inside surface of the inner sleeve. Instead, inner sleeve 210 will have the very end at the deep end of the recess or at the conical end of the inner sleeve provided with a means for coupling to disappearing bolt 211 to prevent relative rotation between the bolt and sleeve at least in one direction as hereinafter described. This may be attained in a simple manner by having enlarged head 212 of the disappearing bolt shaped to provide a square or hex shape, lit into square or hexrecess 213 in the conical end of inner sleeve 210. In this specific example, the disappearing bolt thread can be right-hand and the outer thread 215 of inner sleeve 21) would be left-hand. The remaining parts of the structure can be the same as in FIGURE 3. The threaded end of bolt 211 can have suitable means such as screw eye 217 for permitting the bolt to be lished up from a well below the anchorage so that the threaded portion can be pulledup above the iioor. It is understood that bolt 211 must be slidable in sleeve 2111. It is obvious that when a. nut is turned in a clockwise (righbhand) direction, the arrangement is such that conical portion 213 will be turned anti-clockwise (left-hand) to tighten the Vanchorage means. Preferably, the inner end of the anchorage, here conical portion 219, carries housing 221) for disappearing bolt 211. p

In order to assemble the anchorage illustrated in FIG- URE 7 and assuming the loose bolt 211 has `a right- 7 hand thread, the following procedure can be used. First bolt 211 is shed up to its top position, Then tubular Spanner wrench 23@ having tongues 231 and 232 is disposedin position so that these tongues engage the slots corresponding to 30 and 31 of FIGURE 2. Then blind nut 235 having blind threaded recess 236 is disposed over the projecting threaded end of bolt 211. Since the bolt is in its top position where the head engages the bottom end of the inner sleeve, blind nut 235 can be turned until it is tight on bolt 211. In the meantime, Spanner wrench 230 is held tightly. To tighten the assembly, blind nut 235 can be turned clockwise while holding Spanner wrench 230 tight or blind nut 235 can be held stationary and Spanner wrench 230 turned anti-clockwise. In either case, the net result will be that conical portion 218 will be turned anti-clockwise with respect to the inner sleeve and since the threads are left-hand, conical portion 21S will be forced down for tightening the entire anchorage.

As can be seen in FIGURE 7, the bottom portion of bottom cone 219 carries 22d extending into a well into the floor and this housing will permit bolts 211 to drop to the full line position illustrated in the drawing.

Referring now to FIGURE 8, a generally similar well structure corresponding to the form of the invention illustrated in FIGURES 4 to 6 inclusive is illustrated. The bolt here is similar to the bolt in FIGURE 7. The ratchet knurl arrangement is similar in all respects to the structure shown in FIGURES 4 to 6 inclusive. The assembly of this arrangement in the well has the collar and sleeve indicated by 140 and 137 in FIGURE 5 and may be used in the anchorage illustrated in FIGURE 8. However, stud 133 of FIGURE 5 cannot be used and, instead, the bolt is kept from turning or may be turned in the desired direction by operating thereon as in FIG- URE 7.

lt is clear that when the anchorage as illustrated in FIG- URES 7 and 8 is linally installed in the iloor, when a bolt such as 211 is pulled up and a piece of machinery bolted down with a nut as illustrated in dotted line, any tendency for the nut in dotted lines to turn bolt 211 will result in bolt head 212 at the bottom of the disappearing bolt tending to turn the parts in a direction to tighten the anchorage. This is true in respect to all of the modifications. Y

The size of the ratchet knurling teeth, as illustrated in the drawing, is exaggerated and in practice these teeth will be quite small.

What is claimed is:

1. An anchorage for bolt means having a thread of one hand, said anchorage being adapted to be wedged in a recess in a solid body, said anchorage comprising an elongated inner metal sleeve having a rear end for disposition deep within said body recess and having a front end to lie nearer the open end of said body recess, said inner sleeve having an externally threaded portion extending rearwardly from the front end of said inner sleeve and having a rear portion shaped so that the outer surface thereof is generally conical with the large end of the cone being nearer the rear end of said inner sleeve, the external thread on said inner sleeve being of a hand opposite to the bolt means thread, said inner sleeve further having an internally threaded portion of the same hand as the bolt means to threadedly receive said bolt means, outer metal sleeve means disposed about the inner sleeve, said outer sleeve means having a rear portion thereof longitudinally slotted and dimensioned, so that said rear portion of said outer sleeve means is normally too small to accommodate the conical end of said inner sleeve but can be forced to do so with the slots permitting Vlateral expansion of said rear portion of said outer sleeve means, the surface of the cone-shaped portion of the inner sleeve being provided with ratchet teeth Whose edges are generally parallel to the sleeve axis, said teeth being oriented in a direction opposite to that of the external thread on the inner sleeve, the opposing surface of said outer sleeve having longitudinally extending irregularities formed thereon, said teeth cooperating with said irregularities to impede relative rotary movement between the two sleeve parts in one direction, said outer sleeve means having a separate front portion thereof as a nut portion internally threaded to cooperate with the external thread of said inner sleeve and having tool receiving slots at one end, said nut portion being forwardly of the laterally expandable portion and when turned in the proper direction with respect to the inner sleeve serving to force the slotted, expandable rear portion of the outer sleeve means rearwardly toward the large end of the cone, the rear portion of said nut being cone-shaped with the small end of said cone being rearwardly of the large end and engaging the inner surface of the outer sleeve, said outer sleeve means having the front portion thereof longitudinally slotted and dimensioned generally similarly to the rear portion of said outer sleeve means so that the forward portion of said outer sleeve means is normally too small to accommodate the large conical end of said forward cone, the inner surface of said outer sleeve which opposes the conical portion of the nut having irregularities thereon similar to those on the rear portion of said outer sleeve, the surface of the conical portion of the nut having ratchet teeth formed thereon, said teeth being substantially identical to the teeth on the rear cone with the teeth on the nut being oriented in the same direction as the external thread on the inner sleeve, said two cones having their small ends facing each other so that upon turning movement of the nut portion in a direction to cause the forward cone to approach the rear cone, any relative movement between the cones and the outer sleeve means permits the ratchet teeth on both cones to slip past the longitudinal irregularities on the slotted portions of the outer sleeve means, reverse relative rotary movement being impeded, whereby said nut is prevented from rotating in the direction in which the bolt is turned, said anchorage being effective in a recess providing substantial clearance about said outer sleeve prior to installation.

2. An anchorage for bolt means having a thread of one hand, said anchorage being adapted to be wedged in a recess of Ia body, said anchorage compri-sing `an elongated inner metal sleeve having a rear end for disposition deep within said recess and having a front end to lie nearer the open end of said recess, said inner sleeve having an internally threaded portion accessible to and cooperating with a lbolt extending into said sleeve from the front, said inner sleeve internal threading being of one hand, said inner sleeve having an externally threaded portion extending rearwardly fr-om the front end of said inner sleeve for a portion of its length, said external threading being of a hand opposite to the internal threading, said inn-er sleeve having at the rear portion thereof an enlarged cone-shaped head with the large end of the cone being .at the extreme rear of said .inner sleeve, an outer metal sleeve disposed about the inner sleeve, said outer sleeve having the rear portion thereof longitudinally slotted and dimensioned so that said rear slotted portion of said outer sleeve is normally too small to accommodate the conical end of said inner sleeve but can be forced to do so with the slots permitting lateral expansion of said rear portion of said other sleeve as it is translated along the sleeve axis toward the rear end of said inner sleeve, said outer sleeve having the front portion thereof free of longitudinal slots .and having internal t-hreading for cooperation with said inner sleeve, said outer sleeve being dimensioned with respect to the inner sleeve so that thread engagement between the inner land outer sleeves occurs prior to lateral expansion of the slotted rear end portion of said outer sleeve, said outer sleeve thereafter being turnable in a direction to translate said outer sleeve and cause said slotted rear end of said outer sleeve to climb along the conical end of said inner sleeve and laterf ally expand the slotted end of said outer sleeve, said conical head of said inner sleeve having on its conical surface ratchet teeth extending straight along the cone surface, the opposing surface of said outer sleeve having longitudinally extending irregularities formed thereon, said teeth being oriented in a direction opposite to that of the external thread on the inner sleeve so that the irregularities on the outer sleeve will slip past the ratchet teeth when said outer sleeve is turned in a direction to force the slotted portion to climb along the conical head of said inner sleeve and to lock on reverse turning, whereby when said anchorage is installed with the outer sleeve forced to expand said slotted end portion, a bolt engaging the inner thread of the inner sleeve will tend to further tighten said anchorage in the recess when said bolt is turned in a direction to tighten in said inner sleeve 3. An anchorage for bolt means having a thread of one hand, said anchorage being adapted to be wedged in a recess, said anchorage comprising an elongated inner :metal sleeve having a rear end for disposition deep within said recess and having a front end to lie nearer the open end of said recess, said inner sleeve having .an externally threaded portion extending rearwardly from the front end of said inner sleeve for a portion of its length, said external threading being of a hand opposite to that of said bolt means, said inner sleeve having at the rear end portion thereof an enlarged cone shaped head with the large end of the cone being at the rear end of said inner sleeve, said inner sleeve also having its its near end a noncircular recess symmetrically disposed about .the sleeve bore, an outer metal sleeve disposed about the inner sleeve, said outer sleeve having the rear portion thereof longitudinally slotted and dimensioned so that said rear slotted portion of said outer sleeve is normally too small to accommodate the conical end of said inner sleeve but can 'be forced to do so with the slots permitting lateral expansion of said rear portion of said outer sleeve as it is translated along the sleeve axis toward the rear end of said inner sleeve, said outer sleeve having the front portion thereof free of longitudinal slots and having internal thread-ing which can cooperate with the external threading of said inner sleeve, said outer sleeve being dimensioned with respect to the inner sleeve so that thread engagement between 4the inner and outer sleeves occurs prior to lateral expansion of the slotted rear end portion of said outer sleeve, said outer sleeve thereafter being turnable in a proper direction to translate saidouter sleeve and cause said slotted rear end of said outer sleeve to climb along the conical end of said inner sleeve and laterally'expand the slotted end of said outer sleeve, said conical head of said inner sleeve having on its conical surface ratchet teeth extending straight along the cone surface, and the opposing surface of said outer sleeve having longitudinally extending irregularities formed thereon, said teeth being oriented in a direction opposite to that of the external thread on the inner sleeve, whereby the irregularities on the outer sleeve will slip past the ratchet teeth when said outer sleeve is turned in `a direction to force the slotted portion to climb along the conical head of said inner Sleeve and to lock on reverse turning, a bolt loosely disposed within the inner sleeve and normally movable longitudinally for a limited distance, said bolt having its thread of one hand and, in inst-alled anchor position for active use, having a non-circular head which fits into the non-circular recess at the rear end of said inner sleeve to lock the two together for turning, said bolt in active use extending within said inner sleeve toward the front thereof and being long enough to project beyond the front end of said inner sleeve when the bolt head is coupled to said inner sleeve at the rear end thereof, said projecting bolt portion accommodating a cooperating nut which, when .tightened on the bolt, will cre-ate a turning force on said inner sleeve with respect to said outer sleeve for further tightening the anchor in the recess, said bolt being adapted to be inactive by moving such bolt when free of its nut longitudinally rearl@ wardly of the inner sleeve to disengage the bolt head from the recessed end of said inner sleeve.

4. An anchorage for bolt means having a thread of one hand, said anchorage being adapted to be wedged in a recess in a body, said anchorage comprising an elongated inner metal sleeve having a rear end for disposition deep within said body recess and having a front end to lie nearer the open end of said body recess, said inner sleeve having an externally threaded portion extending rearwardly from the front end of said inner sleeve and having a rear portion shaped so that the outer surface thereof is generally conical with the large end of the cone being nearer the rear end of said inner sleeve, the external thread on said inner sleeve being of a hand opposite to the bolt means thread, said inner sleeve having at its rear end a non-circular recess symmetrically disposed about the sleeve bore, outer metal sleeve means disposed about the inner sleeve, said outer sleeve means having a rear portion thereof longitudinally slotted and dimensioned so that said rear portion of said outer sleeve means is normally too small to accommodate the conical end of said inner sleeve but can be forced to do so with the slots permitting lateral expansion of said rear portion of said outer sleeve means, the surface of the cone-shaped portion of the inner sleeve being provided with ratchet teeth whose edges are generally parallel to the sleeve axis, said teeth being oriented in a direction opposite to that of the external thread on the inner sleeve, the opposing surface of said outer sleeve having longitudinally extending irregularities formed thereon, said teeth cooperating with said irregularities to impede relative rotary movement between the two sleeve parts in one direction, said outer sleeve means having a separate front portion thereof as a nut portion internally threaded to cooperate with the external thread of said inner sleeve and having tool receiving slots at one end, said nut portion being forwardly of the laterally expandable portion and when turned in the proper direction with respect to the inner sleeve serving to force the slotted, expandable rear portion of the outer sleeve means rearwardly toward the large end of the cone, the rear portion of said nut being cone-shaped with the small end of said cone being rearwardly of the large end and engaging the inner surface of the outer sleeve, said outer sleeve means having the front portion thereof longitudinally slotted and dimensioned generally similarly to the rear portion of said outer sleeve means so that the forward portion of said. outer sleeve means is normally too small to accommodate the large conical end of said forward cone, the surface of the conical portion of the nut having ratchet teeth formed thereon, said teeth being substantially identical to the teeth on the rear cone, the opposing surface of said outer sleeve having irregularities thereon similar to those on the rear portion of said outer sleeve, said two cones having their small ends facing each other and the ratchet teeth on said forward cone being oriented in the same direction as the external thread on the outer sleeve so that upon turning movement of the nut portion in a direction to cause the forward cone to approach the rear cone, any relative movement between the cones and the outer sleeve means permits the ratchet teeth on both cones to slip past the irregularities on the outer sleeve means, reverse relative rotary movement being impeded, a bolt loosely disposed within the inner sleeve and normally movable longitudinally for a limited distance, said bolt having its thread of one hand and, in installed anchor position for active use, having a non-circular head which lits into the noncircular recess at the rear end of said inner sleeve to lock the two together for turning, said bolt in active use extending within said inner sleeve toward the front thereof and being long enough to project beyond the front end of said inner sleeve when the bolt head is coupled to said inner sleeve at the rear end thereof, said projecting bolt portion accommodating a cooperating nut which, when `tightened on the bolt, will create a turning force on said References Cited by the Examiner UNITED STATES PATENTS Summerer 85-67 Paine 85-73 Wilschewski 85--67 Phillips.

12 Hooley. Peirce. Hamill.

Hulrne 50-478 Vaughn. Lovrinch et al. 85-75 FOREIGN PATENTS 417,651 10/34 Great Britain.

CARL W. TOMLTN, Primary Examiner.

EDWARD C. ALLEN, Examiner. 

1. AN ANCHORAGE FOR BOLT MEANS HAVING A THREAD OF ONE HAND, SAID ANCHORAGE BEING ADAPTED TO BE WEDGED IN A RECESS IN A SOLID BODY, SAID ANCHORAGE COMPRISING AN ELONGAGED INNER METAL SLEEVE HAVING A REAR END FOR DISPOSITION DEEP WITHIN SAID BODY RECESS AND HAVING A FRONT END TO LIE NEARER THE OPEN END OF SAID BODY RECESS, SAID INNER SLEEVE HAVING AND EXTERNALLY THREADED PORTION EXTENDING REARWARDLY FROM THE FRONT END OF SAID INNER SLEEVE AND HAVING A REAR PORTION SHAPED SO THAT THE OUTER SURFACE THEREOF IS GENERALLY CONCIAL WITH THE LARGE END OF THE CONE BEING NEARER THE REAR END OF SAID INNER SLEEVE, THE EXTERNAL THREAD ON SAID INNER SLEEVE BEING OF A HAND OPPOSITE TO THE BOLT MEANS THREAD, SAID INNER SLEEVE FURTHER HAVING AN INTERNALLY THREADED PORTION OF THE SAME HAND AS THE BOLT MEANS TO THREADEDLY RECEIVE SAID BOLT MEANS, OUTER METAL SLEEVE MEANS DISPOSED ABOUT THE INNER SLEEVE, SAID OUTER SLEEVE MEANS HAVING A REAR PORTION THEREOF LONGITUDINALLY SLOTTED AND DIMENSIONED, SO THAT SAID REAR PORTION OF SAID OUTER SLEEVE MEANS IS NORMALLY TOO SMALL TO ACCOMMODATE THE CONCIAL END OF SAID INNER SLEEVE BUT CAN BE FORCED TO DO SO WITH THE SLOTS PERMITTING LATERAL EXPANSION OF SAID REAR PORTION OF SAID OUTER SLEEVE MEANS, THE SURFACE OF THE CONE-SHAPED PORTION OF THE INNER SLEEVE BEING PROVIDED WITH RATCHET TEETH WHOSE EDGES ARE GENERALLY PARALLEL TO THE SLEEVE AXIS, SAID TEETH BEING ORIENTED IN A DIRECTION OPPOSITE TO THAT OF THE EXTERNAL THREAD ON THE INNER SLEEVE, THE OPPOSITE SURFACE OF SAID OUTER SLEEVE HAVING LONGITUDINALLLY EXTENDING IRREGULARITIES FORMED THEREON, SAID TEETH COOPERATING WITH SAID IRREGULARITIES TO IMPEDE RELATIVE ROTARY MOVEMENT BETWEEN THE TOW SLEEVE PARTS IN ONE DIRECTION, SAID OUTER SLEEVE MEANS HAVING A SEPARATE FRONT PORTION THEREOF AS A NUT PORTION INTERNALLY THREADED TO COOPERATE WITH THE EXTERNAL THREAD OF SAID INNER SLEEVE AND HAVING TOOL RECEIVING SLOTS AT ONE END, SAID NUT PORTION BEING FORWARDLY OF THE LATERALLY EXPANDABLE PORTION AND WHEN TURNED IN THE PROPER DIRECTION WITH RESPECT TO THE INNER SLEEVE SERVING TO FORCE THE SLOTTED, EXPANDABLE REAR PORTION OF THE OUTER SLEEVE MEANS REARWARDLY TOWARD THE LARGE END OF THE CONE, THE REAR PORTION OF SAID NUT BEING CONE-SHAPED WITH THE SMALL END OF SAID CONE BEING REARWARDLY OF THE LARGE END AND ENGAGING THE INNER SURFACE OF THE OUTER SLEEVE, SAID OUTER SLEEVE MEANS HAVING THE FRONT PORTION THEREOF LONGITUDINALLY SLOTTED AND DIMENSIONED GENERALLY SIMILARLY TO THE REAR PORTION OF SAID OUTER SLEEVE MEANS SO THAT THE FORWARD PORTION OF SAID OUTER SLEEVE MEANS IS NORMALLY TOO SMALL TO ACCOMMODATE THE LARGE CONICAL END OF SAID FORWARD CONE, THE INNER SURFACE OF SAID OUTER SLEEVE WHICH OPPOSES THE CONCIAL PORTION OF THE NUT HAVING IRREGULARITIES THEREON SIMILAR TO THOSE ON THE REAR PORTION OF SAID OUTER SLEEVE, THE SURFACE ON THE CONCIAL PORTION OF THE NUT HAVING RATCHET TEETH FORMED THEREON, SAID TEETH BEING SUBSTANTIALLY IDENTICAL TO THE TEETH ON THE REAR CONE WITH THE TEETH ON THE NUT BEING ORIENTED IN THE SAME DIRECTION AS THE EXTERNAL THREAD ON THE INNER SLEEVE, SAID TWO CONES HAVING THEIR SMALL ENDS FACING EACH OTHER SO THAT UPON TURNING MOVEMENT OF THE NUT PORTION IN A DIRECTION TO CAUSE THE FORWARD CONE TO APPROACH THE REAR CONE, ANY RELATIVE MOVEMENT BETWEEN THE CONE AND THE OUTER SLEEVE MEANS PERMITS THE RATCHET TEETH ON BOTH CONES TO SLIP PAST THE LONGITUDINAL IRREGULARITIES ON THE SLOTTED PORTIONS OF THE OUTER SLEEVE MEANS, REVERSE RELATIVE ROTARY MOVEMENT BEING IMPEDED, WHEREBY SAID NUT IS PREVENTED FROM ROTATING IN THE DIRECTION IN WHICH THE BOLT IS TURNED, SAID ANCHORAGE BEING EFFECTIVE IN A RECESS PROVIDING SUBSTANTIAL CLEARANCE ABOUT SAID OUTER SLEEVE PRIOR TO INSTALLATION. 